Sprint Dial-up, a Paragon of Ambiguity
If you want to get dial-up access through Sprint - have to get it through Sprint - then go to the Earthlink site, but do not visit the Sprint site. What you will find there is the appearance that they themselves provide dial-up service, but it's quite obvious that if indeed they do, they don't give much of a hoot about it any longer, preferring to let the low-end rabble slide over to Earthlink.
The Sprint site still brags about a hardly impressive 440 dial up points in the US and a more impressive 2300 abroad. They act like they offer dial-up, even call it a cost effective alternative, but provide no opportunity for signing on. Even when you go to their online store, they won't tell you how much, but rather request a long forms worth of information, which you exchange for their promise to call you. In fact when you click any link that mentions dial-up, even their link to live dial-up support, you will be taken to dead pages or back to their promise that for the surrendering of one mere telephone number, they will have a qualified specialist get right back at you.
The Carnal Knowledge Motive
There are too many alternatives out there to waste your time trying to deal with Sprints telemarketers. However, if you are so last decade that you are worried that using anyone but Sprint will ruin your chances of a wild fling with Candace Bergen, go ahead and waste your time, but when that salesperson calls, I bet his or her main intention is not to satisfy you with dial-up service anymore than it is to fix you up with the Widow Bergen.